Mondulkiri Robusta Sourcing: What the Geographic, Climate and Supply Data Actually Show

Mondulkiri is currently Cambodia’s best-documented Robusta origin.

That does not mean every common claim about the province is reliable.

Older sourcing articles often present precise cultivation coordinates, province-wide altitude bands, fixed rainfall ranges, district production shares, washing-station counts, standard harvest windows, moisture laws and chemical-composition claims without a source strong enough to support them.

For wholesale sourcing, that precision can be more dangerous than a clearly stated uncertainty.

The stronger approach is to separate what is directly documented from what remains supplier-specific or still needs field verification.

1. Mondulkiri is an origin, not one uniform farm environment

Mondulkiri is a large eastern Cambodian province bordering Vietnam. Coffee production is associated especially with the province’s upland areas, but the province should not be reduced to one altitude, one soil profile or one climate number.

The best peer-reviewed farm-level evidence Origin Coffee Cambodia (OCC.) has located comes from a 2021 Sustainability study of three Coffea canephora plantations in Sen Monorom Municipality.

That distinction matters.

The study describes those research sites. It does not automatically describe every coffee farm in Mondulkiri.

For a sourcing document, site-level data should not be silently converted into province-wide facts.

2. What the Sen Monorom study actually measured

The 2021 study by Ehrenbergerová and colleagues provides a useful local baseline.

For the studied area, the researchers reported:

• annual mean temperature: 22.9°C;
• mean annual rainfall: approximately 2,203 mm;
• average altitude of the studied plantations: around 700 m above sea level;
• dominant soil type at the research areas: latosol, with clayey soil texture through the profile;
• flowering generally reported by growers in March, near the end of the dry season; and
• harvest generally reported in November, at the beginning of the dry season.

These figures are valuable because they come from a named peer-reviewed study.

They should be written as study-site data, not as universal Mondulkiri specifications.

3. Do not turn 700 m into a Fine Robusta altitude rule

One of Cambodia’s best-documented historical Fine Robusta samples also lists approximately 700 m altitude.

CQI Sample 939618 identifies a Cambodian KOFI lot from the 2023/2024 harvest as TR4, Dry Ferment, approximately 700 m and 80.50 points under the historical Q Robusta system.

That does not prove that 700 m is the ideal Fine Robusta altitude.

Altitude interacts with temperature, water, genetics, shade, soil, harvest and processing. Canephora can be cultivated across different environments.

For sourcing, altitude is metadata—not a grade.

4. Shade research gives Mondulkiri a useful agronomic signal

The same 2021 study compared shaded and sunny sections of the three plantations.

Within those studied farms, shade did not significantly reduce coffee bean size, bean weight, total fruit weight per shrub or measured yield. Soil moisture was higher in shaded sites.

That is strategically important because agroforestry can offer ecological services while helping maintain soil moisture.

But it should not be exaggerated.

The study does not prove that every shade design produces the same yield. Shade species, density, root competition, soil, farm management and climate can differ.

The responsible sourcing conclusion is:

Mondulkiri has peer-reviewed local evidence that shade-based Canephora systems can maintain yield while improving soil-moisture conditions in the studied plantations.

5. New climate research changes how Robusta should be described

Robusta is often marketed as more climate resilient than Arabica.

In August 2026, Reuters reported a new study challenging the broad version of that claim. The key distinction is that Robusta can be more heat tolerant, but heat tolerance is not the same as drought tolerance.

Water stress remains a serious limitation.

For Mondulkiri sourcing, this makes the local soil-moisture research more relevant.

The sourcing question is no longer simply:

“Is Robusta resilient?”

It becomes:

• How reliable is rainfall at the farm?
• What happens in a severe dry period?
• Is irrigation used?
• What shade system exists?
• Which planting material is used?
• How does the farm manage soil moisture?

Those are more useful questions than a species-level climate slogan.

6. Current production data show growth, but they need scope labels

Cambodian coffee statistics are often contradictory because different reports describe different years, geographies and product stages.

In August 2024, the Mondulkiri provincial agriculture department reported more than 500 hectares of coffee in the province. Of that, 346 hectares were under harvest, with an average reported yield of 2.096 tonnes per hectare.

The same report stated that in 2023 coffee covered 525 hectares and involved 365 farming families, with total harvest reported at about 725 tonnes.

These are dated provincial figures.

They should not be mixed with later national statistics as if they refer to the same population.

7. The 2026 national figures are larger—and national

In June 2026, Phnom Penh Post reporting citing a spokesperson for Cambodia’s Ministry of Agriculture, Forestry and Fisheries stated that national coffee cultivation had expanded to approximately 705 hectares.

The report said 563 hectares were under harvest, producing 1,333 tonnes, with an average reported yield of 2.36 tonnes per hectare.

These are national figures, not a Mondulkiri-only total.

They show an expanding sector but also illustrate why sourcing articles must preserve scope.

A buyer should not write “Mondulkiri produces 1,333 tonnes” based on a national number.

8. Product-stage terminology remains a data problem

Cambodian reporting may use terms such as “coffee beans” without always making clear whether the number refers to:

• fresh cherry;
• dried cherry;
• parchment;
• hulled green coffee; or
• another commercial stage.

That matters because conversion losses between stages are substantial.

For procurement, the correct response is not to guess.

Record the unit and product stage used by the supplier.

If a national statistic does not specify the stage clearly enough for a direct commercial conversion, use it as sector context—not as a precise green-coffee supply forecast.

9. Mondulkiri’s supplier network is becoming more organized

SNV’s 2026 business-case documentation for KOFI describes a structured local supply-chain build-out supported through the Dutch Fund for Climate and Development.

The report says KOFI’s local grower network increased from 365 farmers in 2023 to 484 in 2025, alongside farmer training, agroforestry models, nursery development and new processing infrastructure.

This is company-program data.

It should not be used as a province-wide count of all coffee farmers.

But for sourcing, it demonstrates that one of the main commercial networks has become more organized and locally integrated.

10. Processing infrastructure has improved

SNV’s project documentation describes investment in processing and nursery facilities, while Cambodian reporting has documented KOFI’s natural coffee processing facility in Mondulkiri.

This matters because an origin’s commercial potential depends on more than farm production.

Quality-focused Canephora requires:

• cherry intake control;
• lot separation;
• fermentation/process control;
• drying;
• storage;
• hulling/sorting where applicable; and
• traceability.

A sourcing visit should therefore evaluate the processing unit as carefully as the farm.

11. Do not assume one province-wide processing style

Mondulkiri Robusta is not automatically natural, washed, dry ferment or anaerobic.

Different suppliers and lots use different methods.

Historical Cambodian Q Robusta records already show variation in processing.

For wholesale buying, process should be attached to the lot, not the origin label.

If a supplier describes a coffee as “Dry Ferment,” “anaerobic natural” or another controlled process, ask for the process record and sensory evidence.

12. Harvest timing should be supplier-verified

The 2021 Sen Monorom study reports grower information indicating a general harvest in November at the beginning of the dry season.

That is useful local evidence.

It does not justify a rigid province-wide statement such as “Mondulkiri harvest is November to March” without more current multi-area data.

Harvest can shift with variety, elevation, rainfall and farm management.

A wholesale buyer should ask the supplier for the actual harvest period of the lot.

13. Rainfall helps Robusta, but water risk still matters

The Sen Monorom study’s long-term rainfall figure of about 2,203 mm shows that the study area is relatively wet.

That does not eliminate seasonal water stress.

The same research measured periods when soil moisture in some sunny sites fell into a water-deficit range used by the study, while shaded sites generally retained more moisture.

Combined with the 2026 Robusta climate research, the lesson is clear:

annual rainfall totals do not tell the whole water story.

Distribution, soil storage, dry-season intensity, shade and farm practices matter.

14. Soil claims should be kept local and testable

The 2021 study describes latosol and clayey texture at the three research areas.

That is stronger than repeating generic marketing claims about “red volcanic soil creating chocolate flavor.”

Soil can influence plant nutrition and water dynamics, but Origin Coffee Cambodia (OCC.) has not located evidence proving that one Mondulkiri soil characteristic creates a specific cup flavor.

For sourcing, soil is useful agronomic metadata.

It should not be turned into sensory causality without research.

15. Mondulkiri does not yet have one proven regional flavor profile

Individual Cambodian Canephora lots have documented quality results, but the public record still lacks a large, multi-farm, multi-harvest descriptive sensory dataset.

That means a supplier can describe the verified profile of a specific lot.

It should not declare that every Mondulkiri coffee tastes like chocolate, caramel, spice or fruit.

Origin Coffee Cambodia (OCC.)’s preferred approach is to build a sensory dataset over multiple harvests and let recurring patterns emerge from the evidence.

16. Buyer interest should focus on lot-level repeatability

For a roaster or hotel group, the most important sourcing question is not whether Mondulkiri is “good.”

It is whether a supplier can repeatedly deliver the intended profile.

Ask for:

• previous comparable lots;
• current lot sample;
• available volume;
• physical QC;
• sensory profile;
• process consistency; and
• delivery plan.

An emerging origin can have excellent micro-lots and still have limited repeatable volume.

That is not a failure. It simply needs to be reflected in the commercial program.

17. Domestic demand creates a real market pull

June 2026 reporting described Cambodia’s coffee consumption as much larger than local production and noted that local output supplies only a minority of demand.

The exact product-stage comparisons should be interpreted carefully, but the commercial direction is clear: Cambodia has a strong domestic coffee market and remains dependent on imported supply.

For Mondulkiri, that means local buyers can compete with export ambitions for available coffee.

A sourcing strategy should therefore secure relationships and forecast volume rather than assume all local production is available for export.

18. A Mondulkiri sourcing file should include these fields

Origin

Province, district/commune where verified, farm/group/processor.

Harvest

Actual harvest window for the lot.

Plant material

Variety/clone only where records support it.

Farm environment

Altitude, shade, water/irrigation, basic soil information where available.

Process

Cherry intake, fermentation/process, drying, storage.

Physical QC

Current moisture, water activity where relevant, named defect method, screen distribution.

Sensory

Named evaluation method, date, evaluator, descriptors and quality impression.

Volume

Current lot quantity and realistic repeatability.

Traceability

Depth of farmer/group/processor data.

19. What a sourcing visit should verify

When visiting Mondulkiri, a buyer should look beyond landscape photographs.

Check:

1. Cherry maturity at intake.
2. How lots are separated.
3. Whether process labels match actual operations.
4. Drying surface and rain protection.
5. Moisture measurement.
6. Storage ventilation and cleanliness.
7. Lot coding.
8. Farmer or collection-point records.
9. Current prepared volume.
10. Sample-to-stock connection.

A visually impressive farm does not replace this evidence.

20. What not to claim

Origin Coffee Cambodia (OCC.) will not use unsupported statements such as:

• Mondulkiri produces 40–45% of Cambodia’s Robusta unless a current source proves it.
• All Mondulkiri Robusta grows at 400–800 m.
• Every farm receives 2,000–2,500 mm rainfall.
• The province has a fixed number of washing stations unless a current inventory exists.
• Cambodia legally requires green coffee below a fixed moisture number for export without a named regulation.
• Mondulkiri basalt soil causes a specific chlorogenic-acid percentage or flavor profile without direct research.
• Robusta is naturally drought-proof.

The point is not to make Mondulkiri sound less impressive.

It is to make the origin harder to fact-check incorrectly.

Bottom line

Mondulkiri has enough evidence to be taken seriously as Cambodia’s leading Robusta origin, but the strongest story is narrower and more technical than the old marketing version.

Peer-reviewed research documents Canephora production around 700 m in the studied Sen Monorom farms, a mean annual temperature of 22.9°C, approximately 2,203 mm rainfall, higher soil moisture under shade and no measured yield penalty from shade in those sites. Provincial and national reporting shows coffee cultivation expanding. Farmer networks and processing infrastructure are developing. Historical Q Robusta records demonstrate that specific Cambodian lots can reach recognized quality levels.

What Mondulkiri still needs is more multi-farm, multi-harvest sensory, production and lot-level commercial data.

For a wholesale buyer, that is not a reason to wait.

It is a reason to source with better documentation.

References

• Ehrenbergerová, L. et al. “Does Shade Impact Coffee Yield, Tree Trunk, and Soil Moisture on Coffea canephora Plantations in Mondulkiri, Cambodia?” Sustainability 13(24), 13823 (2021). https://doi.org/10.3390/su132413823
• Phnom Penh Post — Mondulkiri coffee farmers urged to expand after Fine Robusta recognition, 16 August 2024.
• Phnom Penh Post — Bean counters: Demand sees surge in coffee production, 6 June 2026.
• SNV — Business case spotlight: Kofi, 2026.
• Reuters — Robusta coffee climate resilience “an internet myth,” author of new study says, 28 August 2026.
• Coffee Quality Institute — historical Cambodia Q Robusta Sample 939618.

Related Origin Coffee Cambodia (OCC.) reading:

• Robusta Cambodia: Fine Robusta, Mondulkiri, Growing Conditions, and Quality Evidence
• Can Mondulkiri Build a Canephora Sensory Identity?
• From One 80.5-Point Lot to an Origin
• The Ecosystem Behind Cambodia Fine Robusta

Related Origin Coffee Cambodia (OCC.) internal guides

Continue with the Fine Robusta standards guide, the Mondulkiri origin profile, the coffee processing and quality-control guide, and the farmer impact and sourcing guide.